Who uses the Web?

Good question! The web is certainly biased toward the thirtyish, anglo-saxon, male and technology-friendly crowd at this point, but there's more to the story; the demographics of the web are changing rapidly as the user base grows. The GVU WWW User Survey (URL is <URL:http://www.cc.gatech.edu/gvu/user_surveys/User_Survey_Home.html> ) attempts to answer the question in detail. You can access the results of past surveys and contribute information of your own.
World Wide Web FAQ